Locomotive engine



Jan. 6, 1 25- 1,522,114

' w F. M. 60-55 LOCOMOTIVE ENGINE Filed Aug. 31, 1925 2 Sheets-Sheet 1w. F. M. 6088 LOCOMOTIVE ENGINE 2 Sheets-Sheet 2 Filed Aug. 31

WITNESSES Patented Jan. 6, 1925.

PATENT oFFI'cE.

WILLIAM F. v1M1. GOSS, OF BARNSTABLE, MASSACHUSETTS.

LOCOMOTIVE ENGINE.

Application filed August 3 To all whom it may concern:

Be it known that I, WILLIAM F. M. Gross, of Barnstable, in the county ofBarnstable and State of Massachusetts, have invented a certain new anduseful' Improvement in Locomotive Engines, of which improvement thefollowing is a specification.

My invention relates to induced draft ap pliances for locomotiveengines, and is an improvement on that for which Letters Patent of theUnited States No. 1,275,672 were granted and issued to me under date ofAugust 13, 1918.

The object of my invention is to provide an induced draft appliance, ofthe general class or type of that set forth in Letters Patent of theUnited States No. 1,275,672 aforesaid, which shall be of ready andconveniently applicability in locomotive boilers of present standardconstruction, and which shall embody simple and effective means forseparating the solid matter of the products of combustion, from thegaseous matter thereof, and preventing its discharge, with the gaseousproducts, from the stack.

The improvement claimed is hereinafter fully set forth.

In the accompanying drawings, Figure 1 is a vertical longitudinalcentral section through the forward portion of a locomotive boiler ofstandard type, illustrating an application of my invention; and Figs. 2and 3,

transverse sections, on the lines a a and b b,

respectively, of F ig. 1.

Referring descriptively to the specific embodiment of my invention whichis herein exemplified, it is illustrated as applied in a locomotiveboiler of the present standard type, in which the shell or waist, 1, istraversed by a plurality of fire tubes, 2', extending from a firebox inthe rear, which is not shown, to a smoke box, 4, connected, in the usualmanner, to the shell, 1, of the boiler. The smoke box is, as usual,supported on cylinder saddles, and, in the instance shown it isincreased in length by the addition of a removable extension ring, 4,which in connected to its main body by angle irons, 4 and bolts. Theforward end of the smoke box is closed by a front, 4", having a door,4", closing an opening in the front, through .which access is affordedto the interior of the smoke box, in which there is located asuperheater header, 5, superheater pipes, 5*, steam pipes, 6, etc. Thewaste gases of combustion 1, 1923. Serial No. 660,374.

. are discharged to the atmosphere through a stack, 8, on the smoke box.I In the practice of my invention, as applied in a locomotive boiler ofthe above stated axially, with the boiler. A'draft fan, 14, is

secured upon the'opposite end of the shaft,

12, and a turbo mufiler, 10, which is in theform of a section of ahollow sphere, extends rearwardly from the turbine casing, to a verticalplane a short distance the draft fan.

An exhaust supply pipe, 7 which communicates, in the manner of anordinary exhaust pipe, with the exhaust passages of the cylindersaddles, leads therefrom into the turbine casing, 9, and the exhauststeam which is supplied by said pipe, passes to the turbine, 13, throughorts inthe turbine casing, and after actuating the turbine, escapesradiall therefrom, into the smoke box, through the discharge openingconstituted by the open rear end of the turbo mufiler,10, and thencepasses to the atmosphere, through the stack. The draft fan, 14,issurrounded by, and rotates freely in, a concentric annular cinderseparating chamber, 16, which is closed at its forward end,-and has aninclined outer wall, in the form ofa rearwardly tapering frustum of acone. The open rear end of forward of the chamber, 16, communicates withacol usual relation of the scroll to the fan blower cannot be adopted,by reason of the applica tion of the cinder. separating chamber beforedescribed and, therefore, the scroll is laterally deflected by being, asstated, located eccentrically to the separating chamber. The relation ofthe scroll thereto is designed with reference to such restrictions asare encountered in its use. The scroll may be of either rectangular orrounded section, and increased area in its development may be obtainedby extension radially, or if surrounding conditions render suchextension prohibitive, by axial extension, or by extension in bothdirections, to the end of affording a scroll development, in connectionwith a fan blower which will insure efliciency in the operation of thelatter, and will be within" the limit of/dimensions determined by thegeneral design of the front end of the locomotive boiler.

The space between the chamber, 16, and the turbo blower, which is opento that forward of it in the smoke box,-may, if rendered desirable byexceptional conditions, or required by legal enactment, be closed by asheet of netting or perforated plate, 18, as indicated in Fig. 1.

The products of combustion which are discharged from the front ends ofthe boiler tubes, 2, are conducted therefrom to the draft fan, 14,through an intake tube or conduit, 20, of curved longitudinal peripheralsection, and gradually reduced in transverse section from its reartowards its front end, and extending from the front tube sheet, 2, ,ofthe boiler, to a plane closely adjoining the rear of the draft fan. Thefront end of the intake tube is open, and it is connected, atits rearend, partly to the front tube sheet, 2, and partly to the superheaterheader, or any other member projecting from the tube sheet, so as toprevent the discharge of the products of combustion otherwise thanthrough it. The prime function of the intake tube is to concentrate therelatively wide and slowly moving stream of products of combustion intoa stream reduced in diameter \to that of the intake of the draft fan,with a correspondingly increased. velocity. The progressively forwardlyreduced transverse section of the intake tube is therefore developed ona stream line design. The provision of which increases the efficiencyof. the draft 'fan,'and accuracy in design permits such efficiency.

It has been developed by experience that When-.the gaseous products ofcombustion,

with their commingled burden of solid matter, are'conducted to the draftfan through a plain intake tube, the effect of the impact of the solidparticles,-on the moving blades and other members of the draft fan,

' tends, when sufliciently long continued, to

the destruction of the latter. A secondary function of the intake tubeis to efi'ect a re duction of such impact, and to further increase theefficiency of the draft fan. a To this end, a plurality of upstandingvanes or blades, 20, is secured, to the inside of the intake tube, said.vanes extending substantially longitudinally, or with a pitch of zero,for some distance from their initial or rear ends, and beingincreasingly curved thereafter, so as toimpart to the body or columns ofgasesapproaching the draft fan, a rotary motion in the direction of thatof the draft fan, whereby the solid particles which are commingled withthe gases entering the draft fan, are endowed with a rotary motion,approximately that of the draft fan, resulting in a reduction of impactand prolongation of the life of the latter, as Well as increasing theeflicienoy of its action.

A cinder delivery pipe, 17 leads from the bottom of the cinderseparating chamber, 16, to any preferred receptacle, which may be thefirebox of the boiler, the ash pan, or a box or casing from' which thedelivered solid matter may be withdrawn from time to time as may berequired.

In'order to operate the turbine when it is desired to increase thedraft, in periods in which the locomotive is standing or drifting, avalve controlled blower pipe,- 15, is led from the steam space of theboiler into the turbine casing, 9, said pipe being open to the bucketsof the turbine, through suitable supplemental ports.

In the operation of the appliance, when the locomotive is running understeam, i. e., with its throttle open, all the exhaust steam from thecylinders is*delivered .to the turbine, 13, which, with the connecteddraft fan, lei, is thereby rotated. The centrifugal action of the wingsof the fan, upon the products of combustion passing out of the boilertubes, draws the commingled gaseous and solid constituents of theproducts, through the intake tube, 20, into the separating chamber, 16,in which, by their impingement on its inclined wall, the dust or solidmatter is effectively separated from the gases, and drops to the bottomof the, chamber, from which it is discharged, through the delivery pipe,17, to a suitable receptacle. The gaseous constituents are forced by thefan, from the separating chamber into the scroll, 19, from which theyare continuously discharged to the atmosphere, through the draft pipe,19a, and stack, 8. The exhaust steam from the tur' bin, fills the spacewithin the turbo mufier, and thence escapes, in a quiet, continuousoutflow stream, into the smoke box, in front of the'separating chamber,16, and thence, out of the stack.

Among other features. of operative advantage, there may be noted, themore thorough separation of the solid from the gasebers, other than theintake tube, in the re- 7 movable extension ring, 4.

I claim as my invention and desire to secure by Letters Patent:

1. In a locomotive boiler, the combination with a fan and driving meanstherefor located in the smoke box, of a concentric casing surroundingsaid fan and constituting an'annular cinder-separating chamber closed atits front end with its outer wall inclined rearwardly, and an eccentricspiral collecting ring or scroll communicating with and surrounding theopen rear end of said chamber and open at its top to the stack said ringor scroll being of progressively increasing sectional area.

2. In a locomotive boiler, the combine-- tion with a fan and drivingmeans therefor located in the smoke box, of a concentric casingsurrounding said fan and constituting. an annular cinder-separatingchamber closed at its front end with its outer .wall

inclined rearwardly, a collecting ring or scroll communicating with andsurrounding the 'open rear end of said chamber and open at its top tothe stack, and a forwardly tapering intake tube leading to said fancommunicating and passing through said scroll, said tube having meansfor imparting a rotary motion to the combustion gases in thesamedirection as that of the fan.

3. In a locomotive boiler, the combination, with a fan and driving meanstherefor located in the'smoke box, of a concentric casing surroundingsaid fan and constituting an annular cinder-separating chamber .closedat its front end with its outer wall inclined rearwardly, a collectingring or scroll communicating with and surrounding the open rear end ofsaid chamber and open at its top to the stack, and a forwardly taperingintake tube leading to said fan and passing through said scroll, saidtube containing a plurality of internal blades or vanes, the pitch ofwhich increases towards the ,front end of said tube.-

4. In a locomotive boiler, the combination of a fan in the smoke box, ofan intake tube for leading the products of combustion to said fan, andspiral blades within said tube for imparting whirling motion to saidproducts in the same direction as that in which the fan rotates.

5. In a locomotive boiler, the combination of-a fan in the smoke box, aforwardly tapering intake tube for leading the gases of combustion tosaid fan, and a plurality of blades or vanes spirally arranged withinsaid tube, the pitch of said blades increasing towards the outlet end ofsaid tube, as and for the purpose described.

WILLIAM F. M. GOSS.- Witnesses:

Y J. SNOWDEN BELL,

/ W, R. WARNER.

